Flower store (5)
I believe the answer is:
stock
I believe this clue is a double definition.
'flower' is the first definition.
(I know that stock is a type of flower)
'store' is the second definition.
(I know that store can be written as stock)
(Other definitions for stock that I've seen before include "Wares" , "Bouillon" , "Reputation; shares" , "Consomm-like liquid" , "Keep" .)